My undergrad alma matter graduates a lot of people who think they should get PhDs, and a lot of them go on to do so, in fact, as a percentage of graduates, more of them go on to do so than all but a handfull of US schools, at least in sciences, engineering and mathematics. I've made it a personal mission to get as many of them as possible to consider other options. So, I talk to a lot of people who have PhDs and are looking for options outside of academia, and also a lot of people who exited early with a masters, not to mention a lot of current students and recent grads.
I agree, the only good reason to get a PhD is because you want to, but I'd say that you can't really conclude that until you've got an idea of more of your options, not to mention a better understanding of what your options are as a PhD.
Regarding those options, unfortunately, in the US, there is a long-term effort to seriously screw up our university system, which means that traditional career paths for PhDs into academia and teaching are a lot worse than they used to be. At the same time, graduate students have become the cheapest of labor, which has created an incentive to have more and more of them, which makes the job market for PhDs and Masters degree holders even worse. Even if other countries don't have these same problems with their own university systems, it probably still has an impact outside the US, since the US university system hires and trains a lot of international students.
If I were you, I'd consider the opportunity cost of graduate school. It will be 4-6 years of your life. There is a good chance that it will demand more of your time and energy than your job, and, in the US at least, will pay much less than your job. Is there a better way to spend that time and forgone income? Could you take a job that paid less but gave you more opportunity to learn things that interest you? Could you teach part-time at a technical high-school or two year college (I assume there are analogous institutions in your country)? Could you pursue a masters degree? Some combination? Consider also, how much you'll learn if you remain in your current position. If you've been at your job for two years, then, at the very least, the PhDs you work with likely have at least 2 years more EE experience than you.
As for whether a PhD will hurt your chances of an electronics job, I can't say one way or another. It will influence how employers evaluate your application, and if you don't make clear to them why you are interested in a job that doesn't require a PhD, they will make their own assumptions about you, including the concern that you won't be happy with the work, the pay, or the responsibility and will leave the position before they've gotten their money's worth -- new employees are expensive, it takes time to find them, and time for them to learn enough about the organization to be productive, and the time of other employees to help new employees get up to speed.